\((2,3,5)\) -distributions also arise from the study of the configuration space of two surfaces rolling without slipping or twisting over each other [1]}, [2]} and [3]}. The configuration space can be realised as the An-Nurowski circle twistor distribution [1]} and in the case of two spheres with radii in the ratio \(1:3\)  rolling without slipping or twisting over each other, there is again maximal \(G_2\)  symmetry.
